git/worktree.c
Patrick Steinhardt e7da938570 global: introduce USE_THE_REPOSITORY_VARIABLE macro
Use of the `the_repository` variable is deprecated nowadays, and we
slowly but steadily convert the codebase to not use it anymore. Instead,
callers should be passing down the repository to work on via parameters.

It is hard though to prove that a given code unit does not use this
variable anymore. The most trivial case, merely demonstrating that there
is no direct use of `the_repository`, is already a bit of a pain during
code reviews as the reviewer needs to manually verify claims made by the
patch author. The bigger problem though is that we have many interfaces
that implicitly rely on `the_repository`.

Introduce a new `USE_THE_REPOSITORY_VARIABLE` macro that allows code
units to opt into usage of `the_repository`. The intent of this macro is
to demonstrate that a certain code unit does not use this variable
anymore, and to keep it from new dependencies on it in future changes,
be it explicit or implicit

For now, the macro only guards `the_repository` itself as well as
`the_hash_algo`. There are many more known interfaces where we have an
implicit dependency on `the_repository`, but those are not guarded at
the current point in time. Over time though, we should start to add
guards as required (or even better, just remove them).

Define the macro as required in our code units. As expected, most of our
code still relies on the global variable. Nearly all of our builtins
rely on the variable as there is no way yet to pass `the_repository` to
their entry point. For now, declare the macro in "biultin.h" to keep the
required changes at least a little bit more contained.

Signed-off-by: Patrick Steinhardt <ps@pks.im>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2024-06-14 10:26:33 -07:00

875 lines
22 KiB
C

#define USE_THE_REPOSITORY_VARIABLE
#include "git-compat-util.h"
#include "abspath.h"
#include "environment.h"
#include "gettext.h"
#include "path.h"
#include "repository.h"
#include "refs.h"
#include "setup.h"
#include "strbuf.h"
#include "worktree.h"
#include "dir.h"
#include "wt-status.h"
#include "config.h"
void free_worktree(struct worktree *worktree)
{
if (!worktree)
return;
free(worktree->path);
free(worktree->id);
free(worktree->head_ref);
free(worktree->lock_reason);
free(worktree->prune_reason);
free(worktree);
}
void free_worktrees(struct worktree **worktrees)
{
int i = 0;
for (i = 0; worktrees[i]; i++)
free_worktree(worktrees[i]);
free (worktrees);
}
/**
* Update head_oid, head_ref and is_detached of the given worktree
*/
static void add_head_info(struct worktree *wt)
{
int flags;
const char *target;
target = refs_resolve_ref_unsafe(get_worktree_ref_store(wt),
"HEAD",
0,
&wt->head_oid, &flags);
if (!target)
return;
if (flags & REF_ISSYMREF)
wt->head_ref = xstrdup(target);
else
wt->is_detached = 1;
}
static int is_current_worktree(struct worktree *wt)
{
char *git_dir = absolute_pathdup(get_git_dir());
const char *wt_git_dir = get_worktree_git_dir(wt);
int is_current = !fspathcmp(git_dir, absolute_path(wt_git_dir));
free(git_dir);
return is_current;
}
/**
* get the main worktree
*/
static struct worktree *get_main_worktree(int skip_reading_head)
{
struct worktree *worktree = NULL;
struct strbuf worktree_path = STRBUF_INIT;
strbuf_add_real_path(&worktree_path, get_git_common_dir());
strbuf_strip_suffix(&worktree_path, "/.git");
CALLOC_ARRAY(worktree, 1);
worktree->repo = the_repository;
worktree->path = strbuf_detach(&worktree_path, NULL);
/*
* NEEDSWORK: If this function is called from a secondary worktree and
* config.worktree is present, is_bare_repository_cfg will reflect the
* contents of config.worktree, not the contents of the main worktree.
* This means that worktree->is_bare may be set to 0 even if the main
* worktree is configured to be bare.
*/
worktree->is_bare = (is_bare_repository_cfg == 1) ||
is_bare_repository();
worktree->is_current = is_current_worktree(worktree);
if (!skip_reading_head)
add_head_info(worktree);
return worktree;
}
struct worktree *get_linked_worktree(const char *id,
int skip_reading_head)
{
struct worktree *worktree = NULL;
struct strbuf path = STRBUF_INIT;
struct strbuf worktree_path = STRBUF_INIT;
if (!id)
die("Missing linked worktree name");
strbuf_git_common_path(&path, the_repository, "worktrees/%s/gitdir", id);
if (strbuf_read_file(&worktree_path, path.buf, 0) <= 0)
/* invalid gitdir file */
goto done;
strbuf_rtrim(&worktree_path);
strbuf_strip_suffix(&worktree_path, "/.git");
CALLOC_ARRAY(worktree, 1);
worktree->repo = the_repository;
worktree->path = strbuf_detach(&worktree_path, NULL);
worktree->id = xstrdup(id);
worktree->is_current = is_current_worktree(worktree);
if (!skip_reading_head)
add_head_info(worktree);
done:
strbuf_release(&path);
strbuf_release(&worktree_path);
return worktree;
}
/*
* NEEDSWORK: This function exists so that we can look up metadata of a
* worktree without trying to access any of its internals like the refdb. It
* would be preferable to instead have a corruption-tolerant function for
* retrieving worktree metadata that could be used when the worktree is known
* to not be in a healthy state, e.g. when creating or repairing it.
*/
static struct worktree **get_worktrees_internal(int skip_reading_head)
{
struct worktree **list = NULL;
struct strbuf path = STRBUF_INIT;
DIR *dir;
struct dirent *d;
int counter = 0, alloc = 2;
ALLOC_ARRAY(list, alloc);
list[counter++] = get_main_worktree(skip_reading_head);
strbuf_addf(&path, "%s/worktrees", get_git_common_dir());
dir = opendir(path.buf);
strbuf_release(&path);
if (dir) {
while ((d = readdir_skip_dot_and_dotdot(dir)) != NULL) {
struct worktree *linked = NULL;
if ((linked = get_linked_worktree(d->d_name, skip_reading_head))) {
ALLOC_GROW(list, counter + 1, alloc);
list[counter++] = linked;
}
}
closedir(dir);
}
ALLOC_GROW(list, counter + 1, alloc);
list[counter] = NULL;
return list;
}
struct worktree **get_worktrees(void)
{
return get_worktrees_internal(0);
}
const char *get_worktree_git_dir(const struct worktree *wt)
{
if (!wt)
return get_git_dir();
else if (!wt->id)
return get_git_common_dir();
else
return git_common_path("worktrees/%s", wt->id);
}
static struct worktree *find_worktree_by_suffix(struct worktree **list,
const char *suffix)
{
struct worktree *found = NULL;
int nr_found = 0, suffixlen;
suffixlen = strlen(suffix);
if (!suffixlen)
return NULL;
for (; *list && nr_found < 2; list++) {
const char *path = (*list)->path;
int pathlen = strlen(path);
int start = pathlen - suffixlen;
/* suffix must start at directory boundary */
if ((!start || (start > 0 && is_dir_sep(path[start - 1]))) &&
!fspathcmp(suffix, path + start)) {
found = *list;
nr_found++;
}
}
return nr_found == 1 ? found : NULL;
}
struct worktree *find_worktree(struct worktree **list,
const char *prefix,
const char *arg)
{
struct worktree *wt;
char *to_free = NULL;
if ((wt = find_worktree_by_suffix(list, arg)))
return wt;
if (prefix)
arg = to_free = prefix_filename(prefix, arg);
wt = find_worktree_by_path(list, arg);
free(to_free);
return wt;
}
struct worktree *find_worktree_by_path(struct worktree **list, const char *p)
{
struct strbuf wt_path = STRBUF_INIT;
char *path = real_pathdup(p, 0);
if (!path)
return NULL;
for (; *list; list++) {
if (!strbuf_realpath(&wt_path, (*list)->path, 0))
continue;
if (!fspathcmp(path, wt_path.buf))
break;
}
free(path);
strbuf_release(&wt_path);
return *list;
}
int is_main_worktree(const struct worktree *wt)
{
return !wt->id;
}
const char *worktree_lock_reason(struct worktree *wt)
{
if (is_main_worktree(wt))
return NULL;
if (!wt->lock_reason_valid) {
struct strbuf path = STRBUF_INIT;
strbuf_addstr(&path, worktree_git_path(wt, "locked"));
if (file_exists(path.buf)) {
struct strbuf lock_reason = STRBUF_INIT;
if (strbuf_read_file(&lock_reason, path.buf, 0) < 0)
die_errno(_("failed to read '%s'"), path.buf);
strbuf_trim(&lock_reason);
wt->lock_reason = strbuf_detach(&lock_reason, NULL);
} else
wt->lock_reason = NULL;
wt->lock_reason_valid = 1;
strbuf_release(&path);
}
return wt->lock_reason;
}
const char *worktree_prune_reason(struct worktree *wt, timestamp_t expire)
{
struct strbuf reason = STRBUF_INIT;
char *path = NULL;
if (is_main_worktree(wt))
return NULL;
if (wt->prune_reason_valid)
return wt->prune_reason;
if (should_prune_worktree(wt->id, &reason, &path, expire))
wt->prune_reason = strbuf_detach(&reason, NULL);
wt->prune_reason_valid = 1;
strbuf_release(&reason);
free(path);
return wt->prune_reason;
}
/* convenient wrapper to deal with NULL strbuf */
__attribute__((format (printf, 2, 3)))
static void strbuf_addf_gently(struct strbuf *buf, const char *fmt, ...)
{
va_list params;
if (!buf)
return;
va_start(params, fmt);
strbuf_vaddf(buf, fmt, params);
va_end(params);
}
int validate_worktree(const struct worktree *wt, struct strbuf *errmsg,
unsigned flags)
{
struct strbuf wt_path = STRBUF_INIT;
struct strbuf realpath = STRBUF_INIT;
char *path = NULL;
int err, ret = -1;
strbuf_addf(&wt_path, "%s/.git", wt->path);
if (is_main_worktree(wt)) {
if (is_directory(wt_path.buf)) {
ret = 0;
goto done;
}
/*
* Main worktree using .git file to point to the
* repository would make it impossible to know where
* the actual worktree is if this function is executed
* from another worktree. No .git file support for now.
*/
strbuf_addf_gently(errmsg,
_("'%s' at main working tree is not the repository directory"),
wt_path.buf);
goto done;
}
/*
* Make sure "gitdir" file points to a real .git file and that
* file points back here.
*/
if (!is_absolute_path(wt->path)) {
strbuf_addf_gently(errmsg,
_("'%s' file does not contain absolute path to the working tree location"),
git_common_path("worktrees/%s/gitdir", wt->id));
goto done;
}
if (flags & WT_VALIDATE_WORKTREE_MISSING_OK &&
!file_exists(wt->path)) {
ret = 0;
goto done;
}
if (!file_exists(wt_path.buf)) {
strbuf_addf_gently(errmsg, _("'%s' does not exist"), wt_path.buf);
goto done;
}
path = xstrdup_or_null(read_gitfile_gently(wt_path.buf, &err));
if (!path) {
strbuf_addf_gently(errmsg, _("'%s' is not a .git file, error code %d"),
wt_path.buf, err);
goto done;
}
strbuf_realpath(&realpath, git_common_path("worktrees/%s", wt->id), 1);
ret = fspathcmp(path, realpath.buf);
if (ret)
strbuf_addf_gently(errmsg, _("'%s' does not point back to '%s'"),
wt->path, git_common_path("worktrees/%s", wt->id));
done:
free(path);
strbuf_release(&wt_path);
strbuf_release(&realpath);
return ret;
}
void update_worktree_location(struct worktree *wt, const char *path_)
{
struct strbuf path = STRBUF_INIT;
if (is_main_worktree(wt))
BUG("can't relocate main worktree");
strbuf_realpath(&path, path_, 1);
if (fspathcmp(wt->path, path.buf)) {
write_file(git_common_path("worktrees/%s/gitdir", wt->id),
"%s/.git", path.buf);
free(wt->path);
wt->path = strbuf_detach(&path, NULL);
}
strbuf_release(&path);
}
int is_worktree_being_rebased(const struct worktree *wt,
const char *target)
{
struct wt_status_state state;
int found_rebase;
memset(&state, 0, sizeof(state));
found_rebase = wt_status_check_rebase(wt, &state) &&
(state.rebase_in_progress ||
state.rebase_interactive_in_progress) &&
state.branch &&
skip_prefix(target, "refs/heads/", &target) &&
!strcmp(state.branch, target);
wt_status_state_free_buffers(&state);
return found_rebase;
}
int is_worktree_being_bisected(const struct worktree *wt,
const char *target)
{
struct wt_status_state state;
int found_bisect;
memset(&state, 0, sizeof(state));
found_bisect = wt_status_check_bisect(wt, &state) &&
state.bisecting_from &&
skip_prefix(target, "refs/heads/", &target) &&
!strcmp(state.bisecting_from, target);
wt_status_state_free_buffers(&state);
return found_bisect;
}
/*
* note: this function should be able to detect shared symref even if
* HEAD is temporarily detached (e.g. in the middle of rebase or
* bisect). New commands that do similar things should update this
* function as well.
*/
int is_shared_symref(const struct worktree *wt, const char *symref,
const char *target)
{
const char *symref_target;
struct ref_store *refs;
int flags;
if (wt->is_bare)
return 0;
if (wt->is_detached && !strcmp(symref, "HEAD")) {
if (is_worktree_being_rebased(wt, target))
return 1;
if (is_worktree_being_bisected(wt, target))
return 1;
}
refs = get_worktree_ref_store(wt);
symref_target = refs_resolve_ref_unsafe(refs, symref, 0,
NULL, &flags);
if ((flags & REF_ISSYMREF) &&
symref_target && !strcmp(symref_target, target))
return 1;
return 0;
}
const struct worktree *find_shared_symref(struct worktree **worktrees,
const char *symref,
const char *target)
{
for (int i = 0; worktrees[i]; i++)
if (is_shared_symref(worktrees[i], symref, target))
return worktrees[i];
return NULL;
}
int submodule_uses_worktrees(const char *path)
{
char *submodule_gitdir;
struct strbuf sb = STRBUF_INIT, err = STRBUF_INIT;
DIR *dir;
struct dirent *d;
int ret = 0;
struct repository_format format = REPOSITORY_FORMAT_INIT;
submodule_gitdir = git_pathdup_submodule(path, "%s", "");
if (!submodule_gitdir)
return 0;
/* The env would be set for the superproject. */
get_common_dir_noenv(&sb, submodule_gitdir);
free(submodule_gitdir);
strbuf_addstr(&sb, "/config");
read_repository_format(&format, sb.buf);
if (verify_repository_format(&format, &err)) {
strbuf_release(&err);
strbuf_release(&sb);
clear_repository_format(&format);
return 1;
}
clear_repository_format(&format);
strbuf_release(&err);
/* Replace config by worktrees. */
strbuf_setlen(&sb, sb.len - strlen("config"));
strbuf_addstr(&sb, "worktrees");
/* See if there is any file inside the worktrees directory. */
dir = opendir(sb.buf);
strbuf_release(&sb);
if (!dir)
return 0;
d = readdir_skip_dot_and_dotdot(dir);
if (d)
ret = 1;
closedir(dir);
return ret;
}
void strbuf_worktree_ref(const struct worktree *wt,
struct strbuf *sb,
const char *refname)
{
if (parse_worktree_ref(refname, NULL, NULL, NULL) ==
REF_WORKTREE_CURRENT &&
wt && !wt->is_current) {
if (is_main_worktree(wt))
strbuf_addstr(sb, "main-worktree/");
else
strbuf_addf(sb, "worktrees/%s/", wt->id);
}
strbuf_addstr(sb, refname);
}
int other_head_refs(each_ref_fn fn, void *cb_data)
{
struct worktree **worktrees, **p;
struct strbuf refname = STRBUF_INIT;
int ret = 0;
worktrees = get_worktrees();
for (p = worktrees; *p; p++) {
struct worktree *wt = *p;
struct object_id oid;
int flag;
if (wt->is_current)
continue;
strbuf_reset(&refname);
strbuf_worktree_ref(wt, &refname, "HEAD");
if (refs_resolve_ref_unsafe(get_main_ref_store(the_repository),
refname.buf,
RESOLVE_REF_READING,
&oid, &flag))
ret = fn(refname.buf, &oid, flag, cb_data);
if (ret)
break;
}
free_worktrees(worktrees);
strbuf_release(&refname);
return ret;
}
/*
* Repair worktree's /path/to/worktree/.git file if missing, corrupt, or not
* pointing at <repo>/worktrees/<id>.
*/
static void repair_gitfile(struct worktree *wt,
worktree_repair_fn fn, void *cb_data)
{
struct strbuf dotgit = STRBUF_INIT;
struct strbuf repo = STRBUF_INIT;
char *backlink;
const char *repair = NULL;
int err;
/* missing worktree can't be repaired */
if (!file_exists(wt->path))
return;
if (!is_directory(wt->path)) {
fn(1, wt->path, _("not a directory"), cb_data);
return;
}
strbuf_realpath(&repo, git_common_path("worktrees/%s", wt->id), 1);
strbuf_addf(&dotgit, "%s/.git", wt->path);
backlink = xstrdup_or_null(read_gitfile_gently(dotgit.buf, &err));
if (err == READ_GITFILE_ERR_NOT_A_FILE)
fn(1, wt->path, _(".git is not a file"), cb_data);
else if (err)
repair = _(".git file broken");
else if (fspathcmp(backlink, repo.buf))
repair = _(".git file incorrect");
if (repair) {
fn(0, wt->path, repair, cb_data);
write_file(dotgit.buf, "gitdir: %s", repo.buf);
}
free(backlink);
strbuf_release(&repo);
strbuf_release(&dotgit);
}
static void repair_noop(int iserr UNUSED,
const char *path UNUSED,
const char *msg UNUSED,
void *cb_data UNUSED)
{
/* nothing */
}
void repair_worktrees(worktree_repair_fn fn, void *cb_data)
{
struct worktree **worktrees = get_worktrees_internal(1);
struct worktree **wt = worktrees + 1; /* +1 skips main worktree */
if (!fn)
fn = repair_noop;
for (; *wt; wt++)
repair_gitfile(*wt, fn, cb_data);
free_worktrees(worktrees);
}
static int is_main_worktree_path(const char *path)
{
struct strbuf target = STRBUF_INIT;
struct strbuf maindir = STRBUF_INIT;
int cmp;
strbuf_add_real_path(&target, path);
strbuf_strip_suffix(&target, "/.git");
strbuf_add_real_path(&maindir, get_git_common_dir());
strbuf_strip_suffix(&maindir, "/.git");
cmp = fspathcmp(maindir.buf, target.buf);
strbuf_release(&maindir);
strbuf_release(&target);
return !cmp;
}
/*
* If both the main worktree and linked worktree have been moved, then the
* gitfile /path/to/worktree/.git won't point into the repository, thus we
* won't know which <repo>/worktrees/<id>/gitdir to repair. However, we may
* be able to infer the gitdir by manually reading /path/to/worktree/.git,
* extracting the <id>, and checking if <repo>/worktrees/<id> exists.
*/
static char *infer_backlink(const char *gitfile)
{
struct strbuf actual = STRBUF_INIT;
struct strbuf inferred = STRBUF_INIT;
const char *id;
if (strbuf_read_file(&actual, gitfile, 0) < 0)
goto error;
if (!starts_with(actual.buf, "gitdir:"))
goto error;
if (!(id = find_last_dir_sep(actual.buf)))
goto error;
strbuf_trim(&actual);
id++; /* advance past '/' to point at <id> */
if (!*id)
goto error;
strbuf_git_common_path(&inferred, the_repository, "worktrees/%s", id);
if (!is_directory(inferred.buf))
goto error;
strbuf_release(&actual);
return strbuf_detach(&inferred, NULL);
error:
strbuf_release(&actual);
strbuf_release(&inferred);
return NULL;
}
/*
* Repair <repo>/worktrees/<id>/gitdir if missing, corrupt, or not pointing at
* the worktree's path.
*/
void repair_worktree_at_path(const char *path,
worktree_repair_fn fn, void *cb_data)
{
struct strbuf dotgit = STRBUF_INIT;
struct strbuf realdotgit = STRBUF_INIT;
struct strbuf gitdir = STRBUF_INIT;
struct strbuf olddotgit = STRBUF_INIT;
char *backlink = NULL;
const char *repair = NULL;
int err;
if (!fn)
fn = repair_noop;
if (is_main_worktree_path(path))
goto done;
strbuf_addf(&dotgit, "%s/.git", path);
if (!strbuf_realpath(&realdotgit, dotgit.buf, 0)) {
fn(1, path, _("not a valid path"), cb_data);
goto done;
}
backlink = xstrdup_or_null(read_gitfile_gently(realdotgit.buf, &err));
if (err == READ_GITFILE_ERR_NOT_A_FILE) {
fn(1, realdotgit.buf, _("unable to locate repository; .git is not a file"), cb_data);
goto done;
} else if (err == READ_GITFILE_ERR_NOT_A_REPO) {
if (!(backlink = infer_backlink(realdotgit.buf))) {
fn(1, realdotgit.buf, _("unable to locate repository; .git file does not reference a repository"), cb_data);
goto done;
}
} else if (err) {
fn(1, realdotgit.buf, _("unable to locate repository; .git file broken"), cb_data);
goto done;
}
strbuf_addf(&gitdir, "%s/gitdir", backlink);
if (strbuf_read_file(&olddotgit, gitdir.buf, 0) < 0)
repair = _("gitdir unreadable");
else {
strbuf_rtrim(&olddotgit);
if (fspathcmp(olddotgit.buf, realdotgit.buf))
repair = _("gitdir incorrect");
}
if (repair) {
fn(0, gitdir.buf, repair, cb_data);
write_file(gitdir.buf, "%s", realdotgit.buf);
}
done:
free(backlink);
strbuf_release(&olddotgit);
strbuf_release(&gitdir);
strbuf_release(&realdotgit);
strbuf_release(&dotgit);
}
int should_prune_worktree(const char *id, struct strbuf *reason, char **wtpath, timestamp_t expire)
{
struct stat st;
char *path;
int fd;
size_t len;
ssize_t read_result;
*wtpath = NULL;
if (!is_directory(git_path("worktrees/%s", id))) {
strbuf_addstr(reason, _("not a valid directory"));
return 1;
}
if (file_exists(git_path("worktrees/%s/locked", id)))
return 0;
if (stat(git_path("worktrees/%s/gitdir", id), &st)) {
strbuf_addstr(reason, _("gitdir file does not exist"));
return 1;
}
fd = open(git_path("worktrees/%s/gitdir", id), O_RDONLY);
if (fd < 0) {
strbuf_addf(reason, _("unable to read gitdir file (%s)"),
strerror(errno));
return 1;
}
len = xsize_t(st.st_size);
path = xmallocz(len);
read_result = read_in_full(fd, path, len);
if (read_result < 0) {
strbuf_addf(reason, _("unable to read gitdir file (%s)"),
strerror(errno));
close(fd);
free(path);
return 1;
}
close(fd);
if (read_result != len) {
strbuf_addf(reason,
_("short read (expected %"PRIuMAX" bytes, read %"PRIuMAX")"),
(uintmax_t)len, (uintmax_t)read_result);
free(path);
return 1;
}
while (len && (path[len - 1] == '\n' || path[len - 1] == '\r'))
len--;
if (!len) {
strbuf_addstr(reason, _("invalid gitdir file"));
free(path);
return 1;
}
path[len] = '\0';
if (!file_exists(path)) {
if (stat(git_path("worktrees/%s/index", id), &st) ||
st.st_mtime <= expire) {
strbuf_addstr(reason, _("gitdir file points to non-existent location"));
free(path);
return 1;
} else {
*wtpath = path;
return 0;
}
}
*wtpath = path;
return 0;
}
static int move_config_setting(const char *key, const char *value,
const char *from_file, const char *to_file)
{
if (git_config_set_in_file_gently(to_file, key, NULL, value))
return error(_("unable to set %s in '%s'"), key, to_file);
if (git_config_set_in_file_gently(from_file, key, NULL, NULL))
return error(_("unable to unset %s in '%s'"), key, from_file);
return 0;
}
int init_worktree_config(struct repository *r)
{
int res = 0;
int bare = 0;
struct config_set cs = { { 0 } };
const char *core_worktree;
char *common_config_file;
char *main_worktree_file;
/*
* If the extension is already enabled, then we can skip the
* upgrade process.
*/
if (r->repository_format_worktree_config)
return 0;
if ((res = git_config_set_gently("extensions.worktreeConfig", "true")))
return error(_("failed to set extensions.worktreeConfig setting"));
common_config_file = xstrfmt("%s/config", r->commondir);
main_worktree_file = xstrfmt("%s/config.worktree", r->commondir);
git_configset_init(&cs);
git_configset_add_file(&cs, common_config_file);
/*
* If core.bare is true in the common config file, then we need to
* move it to the main worktree's config file or it will break all
* worktrees. If it is false, then leave it in place because it
* _could_ be negating a global core.bare=true.
*/
if (!git_configset_get_bool(&cs, "core.bare", &bare) && bare) {
if ((res = move_config_setting("core.bare", "true",
common_config_file,
main_worktree_file)))
goto cleanup;
}
/*
* If core.worktree is set, then the main worktree is located
* somewhere different than the parent of the common Git dir.
* Relocate that value to avoid breaking all worktrees with this
* upgrade to worktree config.
*/
if (!git_configset_get_value(&cs, "core.worktree", &core_worktree, NULL)) {
if ((res = move_config_setting("core.worktree", core_worktree,
common_config_file,
main_worktree_file)))
goto cleanup;
}
/*
* Ensure that we use worktree config for the remaining lifetime
* of the current process.
*/
r->repository_format_worktree_config = 1;
cleanup:
git_configset_clear(&cs);
free(common_config_file);
free(main_worktree_file);
return res;
}